Design and Implementation of Configuration Map Symbol

With the development of smart cities, Internet of Things (IoT) and Geographic Information Systems (GIS) technologies are gradually being integrated, more and more application architectures for IoT are based on GIS, especially in the management of sensor device and related applications. In the GIS-based sensor device management application, the sensor device is abstracted into map symbol and displayed on the map, the position and attribute information of the sensor are intuitively displayed by map symbols. Because the design and rendering process of traditional map symbol lacks the method of combining with real-time data of sensors, the traditional map symbols can't be used to visualize real-time sensor data in the process of GIS visualization. In the field of real-time monitoring, supervisory control and data acquisition system (SCADA) established the mapping relationship between sensor data and graphic elements in the graphical interface, which called configuration method, to realize real-time visualization of sensor data. In this paper, we refer to the configuration method and applies it to the design process of map symbols. Based on the traditional vector map symbol, the mapping relationship between the sensor data and the graphic element is defined in the map symbol design process. When the map symbol is rendered in the GIS environment, the configuration map symbol is integrated into the map layer. Communication module in the client which communicates with the communication server receives real-time sensor data and triggers the refresh of the map layer. According to the data received, the configuration symbols are redrawn and realize the real-time visualization of the sensor data in GIS environment. All the methods and processes shown above have been verified in Geo Tools.